在格林纳丁群岛的早期弧形地形成被保存,南方的小安提勒斯群岛弧形
Michal Camejo-Harry1, Elena Melekhova1, Sarah Aufrère2
1Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, UK.
Royal Society open science
|July 30, 2024
概括
调查格林纳丁群岛揭示了独特的火山活动和岩组成,提供了对早期俯冲过程和弧形地形成的见解. 这项研究通过检查岩石学数据和构造历史来解释弧内多样性.
科学领域:
- 地质地质地质地质地质地
- 火山学 火山学是一门学科.
- 石化学 石化学是一门学科.
背景情况:
- 火山活动和组成的弧内多样性是常见的,但往往无法解释.
- 格林纳丁群岛位于小安提勒群岛,与北方群岛相比,它具有独特的火山特征.
研究的目的:
- 解释格林纳丁岛内火山活动和组成的偏差.
- 通过采石学数据和构造学背景,研究岩过程中的变化.
主要方法:
- 来自地的石和岩的岩石学数据的分析.
- 检查对压力-温度-化条件的类岩的纹理分析.
- 在群岛的构造历史和地质物理结构的解释.
主要成果:
- 克塞诺利特的纹理分析表明,在不同的地条件下结晶.
- 矿物阶段显示出组成趋势,揭示了岩管道系统中的岛际变异性.
- 喷发的岩地质化学反映了更广泛的弧形的多样性.
结论:
- 格林纳丁群岛可能代表了引流的早期阶段,引发了小安蒂尔群岛弧.
- 火山活动很可能始于海底活动,随后升起和侵蚀.
- 群岛为早期弧形地形成过程提供了罕见的见解.
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